Description

The pre-commit hook is run just before a commit transaction is promoted to a new revision. Typically, this hook is used to protect against commits that are disallowed due to content or location (e.g., your site might require that all commits to a certain branch include a ticket number from the bug tracker, or that the incoming log message is nonempty).

If the pre-commit hook program returns a nonzero exit value, the commit is aborted, the commit transaction is removed, and anything printed to stderr is marshaled back to the client.